Traction-wheel.



K. N. AVERY.

TRACTION WHEEL.

APPLICATION HLED AUG. 21, 1911.

Pat'ilted Aug.- 27, 1912.

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KENNETH n. AVERY, or covnm, CALIFORNIA.

. TRACTION-WHEEL.

Specification of Letters Patent.

Patented Aug. 2?, 1912.

Application filed August 21,. 1911. swarm. 645,142.

T all whom it may concern:

Be it known that I,,K ENNETH N. AVERY,

a'-c1t1zen of the United States,

v residing at Covma, county of Los Angeles, said State of California, have invented new and use-' ful Improvements 1n Traction-Yiheels, of

' which the. following is a specification.

This invention relates to improvements in traction wheels and particularly to such as are adapted for use as the driving wheels of traction engines or other heavy vehlcles. It is an ob ectof the invention to provide a traction wheel which is formed with devices adapted yielding ground engaging amount of to give the wheelthe proper traction and 'n-eventing the same from slipping or swerving in loose or-broken ground.

It is also an object of the invention to provide a traction wheel which is formed \vlth spring mounted ground engaging profactions which normally embed themselves in loose or tilled grounthbut which are not intended to force themselves into hard surfaces such as roads, paved streets or the like. In the accompanying drawing forming a partof this specification, Figure 1 is a'top plan View of. a traction engine having driying or traction wheels made in accordance with the present invention. Fig. 2 is. an enlarged sectional view taken upon the line ab of Fig. l. sectional view upon the same line as that of the section shown in Fig. 2, but showing the ground engaging projections held at their inner positions-so as not to' engage the ground. Fig. iii; a detail sectional View taken upon the line -d ofFig. 3. The details and features'of the invention will now be specifically described, reference being had to. the drawing in which- 0r rollers 3. A propelling engine or motor 4 of any desired type may be. mounted upon the vehicles for "communicating movement to the driving or traction-wheels 3 through gearing and mechanism. ,7 I

The construction of the traction wheels forms the important features of the inren tion and the said traction wheels may be of any desired type, each being a central broad roller, with ground engaging devices mounted upon one edge or'the other thereof or each wheel. may be of the splitrim type,- the ground engaging portions being. air- Fig. 3 is afragmentary ranged centrally or between the. said.

The latter form of Wheel being the preferred one is the form illustrated'in the drawing. Ea'clr of said Wheels 3is constructed with a drum portion. 5 connected bywebs with a hub 7, the said hub being adapted to more upon a shaft 8 carried by the traction engine.

hollow rims 9 are formed, the treadsurfaces of which are of considerably larger diameter than the diameter of the said drum 5. The rims may be of any desired type and the space between themoutside the periphery of drum 5 is occupied by the ground engaging traction means which is nowto be described.

The traction or preferably consists of a series of projections or detents' 10 which are arranged to project beyond the adjacent peripheries of the rims 9. These projections 10 are preferably carried by springs ll which are of theflat type and are secured at their inner ends to the drum 5 by bolts 12 or other rigid securing means. The projections 10are securedv at points near the outer free ends of the flat springs 11. The detents are generally cross-section and have securing flanges -13 at their bases by which. they may be bolted, riveted or otherwise secured to the springs 11. The 'blo cks are arranged "so that one of their triangular edges projects outwardly between. the rims 9 whenthe springs are in their outer positions thus presenting sharp ground penetrating edges. These edges and the body portions are usually made the full width of the springs 11 though of -c z urse'they may be made narrower and brought-to a sharper-point either in a pyramidal or conical form within the spirit of the invention. The wide edge blocks are however, preferable since they present a strong wearing edge and obtain a firm hold upon the ground. The springs 11 are limited in their outer movement by means of bars or rods l-i which extend from "one rim'9 to the other heat the peripheral surfaces thereblocks carrying the projections 10 inside On each side'of the drum portion 5' ground holding means .formed by blocks made triangularly -1n the said project-ions 'lhese'edditionel rods will always insure the proper retention of "the projections 10 When-the traetionwheeh is in'operetion, so that the said projections will not be forced circumferential. lyioftheI wheel. .The springs 11 are usually made of sufficient-strengthand stiffness to force them firmly against thegroundand tofoause them.

to penetrate loose or tilled groundles'whjen using the Vehicle or traction engine sinegri cultural pursuits When the engine or other Vehicle isto'be moved upon roads or pavements where it is notdesired thatthe projections 10 shall engage, the ground; the 'springsll aretfo'rced inwa y and e .ing rods 15 are, insertedthrough coinpiding apertures -.form ed in the rims of the wheel es'eleerly shown inFigs. 3 and 4;. Cotter-" -p'ins 1601: other removable members ,may he :ernployedwfor holding the said rods: 15 in; -place. Y Thestid rods 15 engage s-th'eends of.-

the springsll when they are depressednnd holdfthem into'suehiposition thatfthe pro- 'iECiSlODS lflndonot engage the ground or extend beyond the peripheries of'the rims When the, Vehicle is to move ,uponloose or tilled ,sQiL the rods 15! are removed...and thesprmgs 11 will, carry the vground. en-

'gag'ingprojections I 10 .tqfltheir outer positions as shown in JEigQ The arrangement of the springs llis-su'ch that-the drum 5 will pull npon thesmne from the bolted ends thereof in securing the-necessary traction for thedrive-wheels. 'Thei-said. springs i 11 are usually made however; of sufficient trength and stifiness to permit of thewheels being -driuwn 'in' the reverse direction. W1thout danger: ofhreaking them, the projecthe rear, hence, the springs- 11 are thereforefl arranged as shown-in Fig. 2, so that the pro-V7 jections 10" Will pull uponflthe springs .insteadmf pushingthem, especially when the Vehicles or implements over; the! ground}; The projections 10 are jpreferebl y vInird'e es;

' n the dret'v'vilig",

that the n said 'faces tend f to support t I loose ground as well as to propje tions 10 engaging the ground. in the same 5 trated in Fig. 1 of the dra'w'in'g is preferably manner as befoie The traction engine il1us 1driven'Wit-h the ltraction wheels 3 et' the front the guide whee-l on'roller 2 being; at

traction engine; is being;- used to d-raw'other' shown in Figsxl gandr a with inclined fecesfor the.;r' aso What is claimed is v l. A t-ra'ctionlwheel corn prising" drum,

, erim jportion outsi'dejthe same, a' -series of tangential springs 'cerr ed'by the said drum r 1 se ur n th rwhee end.,having ground engaging points. at their an st ree'end's extending beyond" the run P0111011 'ecessery tractionfor the 'treetio'n for the Wheel. v A (llivirigjwheel-ior traction-engines so as to holdthe saidof said peripheral portion; '6. tract on wheel for :ing a hub portion and a peripheral supdepressed rim portion and a ground support ng r1m port1on,ysp'r1ngs secured to said 2 A wheel. for traction engines ha ing a y depressedrim portion at one end and at the A otherend carrying pointed members extending beyond the ground supporting rim portion andtidapted to engage the ground and penetrate the selme for securing the proper herring a. rim portion. with a depressed 'sur- "farce, springs secured atltheir'iinner' ends to said depressed surface and triangular blocks secnredfto the outer ends of seidsprings,

their sharp edges beingfadapted "to engege the' 'rolund and means for-limiting the out W'ard inoir'ement of the'sn'id springs.

4:. driving wheefl for'trajction engines.

limingv e "peripheral portion providediwith springs .seenred' thereto at their inner ends,- -gronnd fengagingdeten'ts "carried by their oljlter end's, transverse bar's upon" the spefriph ery' of the Wheel for: limiting the outer -inov'e'ment fof the springs,' and removable rods adapted its be inserted in apertures in therirh of th'e iiv hee'lfo'r holding'thesprings at theinner xti eniitiesoftheir movements A i filf tent'sout of ground g g ng pO sition -f it 5. A traction wheel; for t vehieles, mm-

prising a supporting-peripheral portion, a

gronnd en'gaglng point 7 adjacent to. said 'peripheral portion, 'a' laterally extending re silient arm for, yieldably supporting said point exterior ofseid-fl'peripheral' portion, and means for retaining saidpoint interior 'ehicles cornpris porting portion, laterally extending resilient. arms secured-zit onee'nd between sa d hub' and peripheral portions, and ground I engaging points carried by the other end of said. arms and edspted't'o' projeetbeyond' I a w? the P int" gihs dieoverl inglaterztlly extend.- supporting I said In have hereunto subscribed mymme thislQth day'of Aug St,,1911.: f v H I I KENN EI HN, AWRY Witnesses: {1 1": I i 

